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Description
Kidde Firex 4x KF20LL Optical Smoke & 1x KF30LL Heat Alarm Kit Mains Powered with Long-Life 9V Lithium Battery Back-UpKidde Firex 4x KF20LL Optical Smoke & 1x KF30LL Heat Alarm Kit Mains Powered with Long Life 9V Lithium Battery Back Up FULLY COMPLY WITH THE NEW 2022 SCOTTISH & WELSH REGULATIONS 4x Mains Powered Optical Smoke Alarm (KF20LL): Mains Optical Smoke Alarm Features: Mains powered optical smoke alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat. Once interlinked, the detection of the relevant danger by
Kidde Firex 4x KF20LL Optical Smoke & 1x KF30LL Heat Alarm Kit Mains Powered with Long-Life 9V Lithium Battery Back-Up
FULLY COMPLY WITH THE NEW 2022 SCOTTISH & WELSH REGULATIONS
4x Mains Powered Optical Smoke Alarm (KF20LL):
Mains Optical Smoke Alarm Features:
Mains-powered optical smoke alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat.
Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.
Optical alarms are for use in escape or circulation routes and in areas where there is a danger of ignition of furniture and surroundings by cigarettes producing slow, smouldering fires.
This mains-powered unit should be installed by a qualified electrician and can be used throughout the home, except in the kitchen where a Firex Heat Alarm is recommended. These alarms comply with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).
- Interlink with up to 23 Firex hard-wired alarms – all alarms sound if danger is detected
- Alarm memory – identifies source unit within interconnecting network
- Combined Test/Hush button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
- Auto reset after activation
- Tamper-resistant locking device – prevents unauthorised removal without the use of a tool
- Mains operation – 9V Lithium back-up battery supplied as standard
Mains Optical Smoke Alarm Specification:
- Model KF20LL
- Power Supply 230V mains-powered with 9V Lithium battery back-up
- Temperature Range 0ºC to + 40ºC
- Humidity Range Up to 93% Relative Humidity (RH) non-condensing
- Storage and Transport -20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
- Alarm Dimensions 127 x 127 x 39mm
- Bracket Dimensions 133 x 133 x 6mm
- Alarm Weight 242g
- Warranty 6 years
- Approvals BSI certified to BS EN14604:2005
- CE tested and certified Sensor Optical, circular lateral chamber with insect-resistant width slot entry portals and added bug screen mesh
- Chamber Size 35mm outside diameter x 16mm depth approximate (external)
- Detection Band Infrared light wavelength
- Button Test Simulates the effect of smoke within the sensing chamber, checks electronics and sounder
- Automatic Self-test Circuitry is tested and unit beeps (chirps) if fault is detected
- Supply Voltage 230V AC, 50 Hz (nominal UK voltage)
- Power Consumption < 15mA
- Connection Push-in/snap-fit type connector with 150mm long flying leads (supplied)
- Battery Back-up User-replaceable alkaline 9V battery (522/6LR61)
- Power-on Indicator Continuous green LED
- Alarm Sounder Electronic piezo-electric sounder (T3 pattern sound - 3 pulses - space - 3 pulses), soldered contacts
- Sound Output 85dB (A) minimum at 3 metres
- Alarm Frequency 3.2 kHz typical
- Dust Protection In-built foam gasket in rear of alarm to prevent dust ingress into rear of the alarm
- Alarm Status Red LED flashes approx once every five minutes = normal operation
- Red LED flashes once a second = sensing smoke (sounder alarm sounds)
- Red LED flashes once every ten seconds = in hush condition (auto-reset after 15 minutes)
- Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected with optional control (see below)
- Optional Controls Wired Remote Test and Hush Unit (REMTH) allows test and hush of interlinked units
- Optional Pattresses SMK23RU also has integral switchable relay for operating remote devices
- SMK4896 – Surface mounting base for added ease of installation
- Fixing Mounting bracket ring supplied with two ‘T’ slot fitting option
- 57mm spacing to a maximum of 90mm for standard screw fittings on back boxes
- Bracket has 50mm diameter central access hole for cabling
- Plastics used NORYL – Cover, main body and mounting bracket
- Lead-Free Status All Firex alarms are lead-free
1x Mains Powered Heat Alarm (KF30LL):
Mains Heat Alarm Features:
Mains-powered heat alarm that can be interlinked with up to 23 other Kidde mains alarms, be they ionisation, optical or heat.
Once interlinked, the detection of the relevant danger by an individual unit will sound across all the connected alarms.
Mains-powered heat alarms can be used throughout the home in humid or dusty environments where an optical or ionisation smoke alarm is unsuitable, e.g. kitchens, loft spaces and garages.
The Firex range requires installation by a professionally qualified electrician and complies with UK Building Regulations for new housing and associated standards (Grade D BS 5839, Part 6).
- Interlink with up to 23 Firex hard-wired alarms – all alarms sound if danger is detected
- Alarm memory – identifies source unit within interconnecting network
- Combined Test/Hush button allows regular testing of alarm function and can be used to temporarily silence nuisance alarms
- Auto reset after activation
- Tamper-resistant locking device – prevents unauthorised removal without the use of a tool
- Mains operation – 9V Lithium back-up battery supplied as standard
Mains Heat Alarm Specification:
- Model KF30LL
- Power Supply 230V mains-powered with 9V Lithium battery back-up
- Temperature Range 0ºC to + 40ºC
- Humidity Range Up to 93% Relative Humidity (RH) non-condensing
- Storage and Transport -20ºC to +60ºC and 5–95% relative humidity (RH) non-condensing
- Bracket Dimensions 127 x 127 x 39mm
- Alarm Dimensions 133 x 133 x 6mm
- Alarm Weight 213g
- Warranty 6 years
- Approvals BSI certified to BS5446 Part 2: 2003
- CE tested and certified
- Sensor Thermistor (Thermal Resistor) within detection unit
- Button Test Simulates the effect of heat at the sensor, checks electronics and sounder
- Automatic Self-test Circuitry is tested and unit beeps (chirps) if fault is detected
- Supply Voltage 230V AC, 50 Hz (nominal UK voltage)
- Power Consumption < 15mA
- Connection Push-in/snap-fit type connector with 150mm long flying leads (supplied)
- Battery Back-up User replaceable alkaline 9V battery (522/6LR61)
- Power-on Indicator Continuous green LED
- Alarm Sounder Electronic piezo-electric sounder (T3 pattern sound - three pulses - space - three pulses) with soldered contacts
- Sound Output 85dB (A) minimum at 3 metres
- Alarm Frequency 3.2 kHz typical
- Alarm Status Red LED flashes approx once every five minutes = normal operation
- Red LED flashes once a second = sensing heat in excess of 58ºC (sounder alarm sounds)
- Interconnection Up to 24 Firex and Kidde ‘Slick’ units (smoke, heat and CO) can be hardwire interconnected with optional control (see below)
- Optional Controls Wired Remote Test and Hush Unit (REMTH) allows test and hush of interlinked units
- Optional Pattresses SMK23RU also has integral switchable relay for operating remote devices
- SMK4896 – Surface mounting base for added ease of installation
- Fixing Mounting bracket ring supplied with two ‘T’ slot fitting option
- 57mm spacing to a maximum of 90mm for standard screw fittings on back boxes
- Bracket has 50mm diameter central access hole for cabling
- Plastics used NORYL – Cover, main body and mounting bracket
- Lead-Free Status All Firex alarms are lead-free
Please note: Alarms are sold individually.
Data Sheet:
Data Sheet for KF20LLData Sheet for KF30LL
Instruction Manual:
Instruction Manual for KF20LLInstruction Manual for KF30LL
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
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4.3 ★★★★★
Based on 14 reviews
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Product Reviews
★★★★★ 5
A little-mentioned history
Format: Kindle
Captivating History has released a publication that tells of the period when Italy, under the government of Mussolini, invaded Ethiopia and overthrew the government of Haile Salassee. This war was revenge for Italy's loss against Ethiopia in 1896 but weakened Italy which helped its decision to align with Hitler.
For Ethiopia, the invasion represented a major setback, as it lost its independence and became subject to Italian colonial rule until the defeat of Italy in World War II. Haile Selassie returned to Ethiopia in 1941 after the British, in alliance with Ethiopian resistance fighters, liberated the country.
The Italian invasion of Ethiopia remains a significant event in African history, highlighting the consequences of colonial aggression and the limitations of international diplomacy in preventing such conflicts. It also played a role in shaping Ethiopia's determination to regain its sovereignty and become a symbol of African resistance against colonialism.
This is a worthwhile read as it explores a little-known facet of African history.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 3, 2023
★★★★★ 5
Here’s a strong Amazon-style headline for your review:
“A Clear, Engaging, and Accurate Overview of
“A Clear, Engaging, and Accurate Overview of
Format: Kindle
⭐️⭐️⭐️⭐️⭐️
This book is an excellent read! It provides a well-organized and concise summary of Ethiopia’s entire history, which is no small task given the country’s rich and complex past. The writing is consistent, informative, and historically accurate, making it easy to follow and deeply engaging. I especially appreciate how it also includes insights into Eritrea’s history, offering a broader understanding of the region. I highly recommend this book to anyone seeking a solid, accessible introduction to Ethiopian and Eritrean history. Captivating History did a fantastic job!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 4, 2025
★★★★★ 4
A compact history
Format: Paperback
Sometimes we want to take a historical subject that we know little about and get a brief gloss to learn enough to discover which parts of the subject we want to delve into at greater length. "History of Ethiopia" is exactly what we need to satisfy that desire.
We get the entire history of the African nation, from the very ancient days up to this very year, 2022. naturally, we do not get many nuances. What we do get is the big picture. We know how the various periods in history fit together. From the Queen of Sheba to the nasty era of the Communist Derg, we get a little bit of everything.
One irritation that I had was the coverage of the Ethiopian-Somalia war in the 1970s. The crucial role played by the Cuban army is committed entirely. On the other hand, the 1540 Portuguese expedition headed by Christopher da Gama is briefly but adequately covered. Save for the intervention of da Gama the kingdom might well have been lost.
If you need a fast introduction to Ethiopia, this is a good place to begin. Captivating History, the maker, has dozens of similar books, often on specific, narrowly focuses topics.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 10, 2022
★★★★★ 5
Good book
Format: Hardcover
Spent a year living in Ethiopia 2004 to 2005. What is have read seems very accurate. Very informative book on the history of Ethiopia.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
★★★★★ 5
Ethiopia from the time when the Queen of Sheba ruled
Format: Kindle
Ethiopia has a long rich history that Captivating History managed to cover in 100 pages. This book starts out by letting us know that Ethiopia is one of the first places humans settled in. One of the first kingdoms in Ethiopia was the Kingdom of Aksum. Like most African countries, Aksum established trade routes and had the silk road running through their kingdom.
The Queen of Sheba is a controversial historical leader. Many scholars believe she was queen in Ethiopia. The bible states that a queen of the south came to Israel to meet King Solomon. Historians believe that the queen of the south was in fact the Queen of Sheba. While the queen was there her and King Solomon became very close and when the Queen of Sheba returned to Ethiopia she had King Solomon's baby. Menelik I may have been King Solomon's son. Some believe that when Menelik I when to visit his father, King Solomon, Menelik returned to Ethiopia with the Ark of the Covenant. Some believe that the ark is hidden away in some Ethiopian monastery, still today.
There is still a lot of Ethiopia's history left for you to learn about by reading this book.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 15, 2022
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